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Inventories
 12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories

The components of inventories consisted of the following (in millions):
December 31,
 
2019
 
2018
New vehicles
 
$
1,704.1

 
$
1,700.1

Used vehicles
 
638.1

 
576.8

Parts and accessories
 
91.5

 
88.4

Total inventories
 
$
2,433.7

 
$
2,365.3



The new vehicle inventory cost is generally reduced by manufacturer holdbacks and incentives, while the related floor plan notes payable are reflective of the gross cost of the vehicle.